CN102192270B - Sprocket chain with optimised tooth mounts - Google Patents

Sprocket chain with optimised tooth mounts Download PDF

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Publication number
CN102192270B
CN102192270B CN201110064428.9A CN201110064428A CN102192270B CN 102192270 B CN102192270 B CN 102192270B CN 201110064428 A CN201110064428 A CN 201110064428A CN 102192270 B CN102192270 B CN 102192270B
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CN
China
Prior art keywords
plate
toothed chain
inner panel
pin
thickness
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CN201110064428.9A
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Chinese (zh)
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CN102192270A (en
Inventor
S·贝尔默
V·赫希曼
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Evis Engine Systems Co ltd
Iwis Motorsystem GmbH and Co KG
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Evis Engine Systems Co ltd
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Publication of CN102192270A publication Critical patent/CN102192270A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16GBELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00Chains
    • F16G13/02Driving-chains
    • F16G13/04Toothed chains
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16GBELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00Chains
    • F16G13/02Driving-chains
    • F16G13/08Driving-chains with links closely interposed on the joint pins

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Gears, Cams (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

A toothed chain includes inner chain links and outer chain links alternatingly succeeding one another, the outer chain links comprising at least two outer plates, at least one middle plate and two pins. The inner chain links include at least two inner plates formed as tooth plates, the at least one middle plate being positioned between the inner plates. Each of the inner plates has a plate thickness d and a land width b, a ratio of plate thickness d to land width b being greater than 1.6.

Description

There is the toothed chain optimizing tooth plate
Technical field
The present invention relates to a kind of toothed chain (or having toothed chain), this toothed chain comprises inner link in succession alternating with each other and outer link, this outer link comprises at least two outside plates, plate and two pins at least one, this inner link comprises at least two inner panels being formed as tooth plate, and in this at least one, plate is between inner panel.
Background technique
This toothed chain is such as the control unit of explosive motor.Toothed chain serves as cam shaft drive and provides the transmission of the rotary motion from bent axle to camshaft.In addition, the adjunct unit of explosive motor is also driven by toothed chain mode.This can be such as alternator, for the pump of servo-steering mechanism or air condition compressor.
Toothed chain in modern internal combustion engines is heavy load parts, the huge power during it is exposed to power operation.Such as when changing temperature and in frequent velocity variations, must sometimes all ensures perfectly to operate.And, in Modern Engine, more and more focus on weight and reduce and smooth running, thus people are devoted in its function, roadability all the time and working life is optimized toothed chain.
From the known a kind of common toothed chain of document US 4906224.This toothed chain is alternately set up by outer link and inner link.Outer link is formed by two guide plates, middle plate and two pins.Two tooth plates serve as inner link.Middle plate is pressed in pin.The thickness of tooth plate is the twice of guide plate or middle plate thickness.Herein, the width of tooth plate on the direction transverse to toothed chain expanded range is called as thickness.
A kind of structure possible further of known toothed chain from DE 20304437U1.The outer link of this toothed chain is formed by two outside plates, and these two outside plates are interconnected by two respective pins.Single inner panel serves as inner link, but compared with outside plate, it is manufactured into much wider than described outside plate.In order to more concrete, inner panel is put together also wide than two outside plates.
Cover chain is also known, and it comprises the lining at least extending through inner panel.But this structure causes obvious sound, thus this chain has been applied in automotive engineering seldom.Also know and use a kind of cover type toothed chain, wherein, lining also extends through the inner panel being formed as tooth plate.But the structure of this complexity needs a lot of manufacture work and therefore expends very large manufacture cost, and Here it is, and why automotive industry attempts the reason place avoiding using this chain, because huge cost pressure.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of toothed chain, it has the characteristic of improvement compared with the known embodiment of toothed chain.Especially, abrasion of chain is reduced and fatigue strength is enhanced, and meanwhile attempts obtaining cheap structure.
In common toothed chain, inner panel can thus there is plate thickness d and mesa width (land width) b, and the ratio of plate thickness d and mesa width b is greater than 1.6.Herein, plate thickness d is the orientation measurement transversely in toothed chain longitudinal axis on backboard.Web width b measures between the pin opening and the flank root face (flank) spaced away along force direction of inner panel, and this width is defined as from the flank root face minimum range at a right angle relative to pin opening.Selected ratio between plate thickness d and mesa width b is about the friction caused in chain joint and can reception and produce the expedients of toothed chain.Such as, " wide " design of inner panel achieves so-called lining effect.Thus, although toothed chain does not have lining, this design of toothed chain and the pin opening thus existed produce rubbing action between inner panel and pin, and this only may be present between lining and pin so far.Therefore, by relevant to mesa width for plate thickness be favourable because when plate thickness increases, also can act on larger power on single inner panel, this power must be absorbed by the parameatal material of pin.Herein, mesa width proved may absorbed power the best instruction.And this design is favourable for following reason: the quantity of the shearing point (shear point) on pin is reduced.If be different from wide inner panel and use multiple little inner panel (so-called plate group), then each in described inner panel shows tolerance due to production technology.This result brought is the contact force between single inner panel and the pin part be in contact with it separately is different for each inner panel.Therefore, sell and be loaded differently along its length, this may cause the problem about wearing and tearing and fatigue strength.
In order to calculate the ratio between two sizes, by first size divided by second size.In order to determine the ratio between plate thickness d and mesa width b, thus by plate thickness d divided by mesa width b(namely, d/b).
Alternatively, the ratio of plate thickness and mesa width can also be chosen as and be greater than 1.7, or be greater than 1.75 in a further embodiment.This allows the design favourable further of toothed chain.And have than for 1.6 toothed chain compared with, than for 1.7 or 1.7 toothed chain structure mean that mesa width b is reduced relative to plate thickness d.Be for not having or only having less load peak to be passed to for the motor of toothed chain by it, this makes may be that toothed chain uses the tooth plate design optimized thus.Thus mesa width b can be optimized on material, and does not cause any negative effect to the fatigue strength of toothed chain.
Alternatively, can suppose that the ratio of plate thickness d and mesa width b is less than or equal to 3.Have been found that the random increase of the ratio of plate thickness d and mesa width b does not improve the characteristic of toothed chain further.Such as, must worry, when the inner panel of non-constant width, when namely the ratio of plate thickness and mesa width is greater than 3, necessity lubrication between inner panel and pin cannot be ensured in a secured manner.
In addition, can suppose that the total thickness of all plates of inner link is greater than 1.13 with the ratio of the total thickness of all plates of outer link.This results in the power transmission to the optimization on pin or power introducing.And it has been found that, although the total thickness of all plates of inner link is larger compared with the total thickness of all plates of outer link, this can not cause the excessive loads on outer link.
In addition, can suppose that the axis of symmetry extended along toothed chain to extend through at least one plate or extends between plate at least two contacts.Toothed chain be also configured so that a middle plate or multiple middle plate always therein (namely in the region that the axis of symmetry extends) extend, and inner panel is positioned at both sides adjoins this plate or these plates.This achieve and to introduce to the optimized force on pin and to ensure that the fatigue strength of toothed chain.
According to further embodiment, can suppose that the thickness of a middle plate or the total thickness of multiple middle plate are less than the plate thickness d of inner panel.When this design, the thickness of the sprocket wheel that toothed chain engages can keep little.Middle plate is not need inevitably to be configured to tooth plate, thus it only plays the effect along chain transmitting force, and does not need to contact with sprocket wheel itself.Therefore, the thinner design of middle plate can not cause any shortcoming.
Alternatively, can suppose that at least one, plate is configured to tooth plate.This causes the behavior improved for toothed chain joins in the sprocket wheel be associated.The power occurred between sprocket wheel and toothed chain is passed to larger contact area, and this has favorable influence for the terminal life of tooth chain and sprocket.
According to further embodiment, can suppose that at least one, plate is slid on pin.Thus, middle plate and pin contacts, but not such as be forced on it or be not otherwise releasably connected to pin.Which ensure that simple manufacturing process and avoid unnecessary cost.
In addition, toothed chain can be designed such that outside plate is formed as guide plate.Thus, outside plate does not have castellated shape, but covers the space formed by the tooth of tooth plate.Thus, when the toe joint of sprocket wheel is incorporated in tooth plate, respective tooth is laterally covered by outside plate, prevents chain from laterally sliding on sprocket wheel thus.Thus the outside plate being formed as guide plate can have oval shape.
In addition, the solution of above-mentioned purpose also comprises the inner panel of the toothed chain for one of previous embodiment.
Accompanying drawing explanation
These embodiments are described in more detail, in accompanying drawing now with reference to accompanying drawing:
Fig. 1 is the schematic diagram seen according to the inner panel top side of toothed chain of the present invention;
Fig. 2 is the view that inner panel according to the present invention arrives from the side;
Fig. 3 is the schematic diagram of inner panel according to the present invention from top side; And
Fig. 4 is the schematic diagram of the toothed chain with the outside plate being configured to guide plate.
Embodiment
Fig. 1 shows the part according to toothed chain 1 of the present invention.Toothed chain 1 is made up of the multiple inner links 2 replaced along toothed chain and outer link 3.Outer link 3 comprises at least two outside plates 4, plate 5 and two pins 6 at least one.Inner link comprises at least two inner panels 7 being formed as tooth plate.
Pin 6 transversely extends in the axis of symmetry of toothed chain 1 or the direction of longitudinal axis 8.Belong to same outer link 3 two adjacent pin 6(are each) on, single middle plate 5 is positioned to the centre being substantially in pin 6.Middle plate 5 slides on pin 6, and pin 6 extends through two pin openings of middle plate 5.In addition, two inner panels 7 slide on each pin 6 of outer link 3 respectively, to adjoin and plate 5 in contacting.Inner panel 7 also comprises the pin opening that pin can extend through.Inner panel 7 extends towards adjacent outer link 2 along toothed chain 1 and is attached thereto via respective pin 6.Thus, a pin 6 of the first outer link 2 extends through the first pin opening 15 of inner panel 7, and the second pin 6 of the second outer link 2 extends through the second pin opening 15 of inner panel 7.Then inner panel 7, pin 6 located respective outside plate 4 thereon, and pin 6 also extends through described outside plate 4.Outside plate 4 can be forced on pin or can rivet with it.Thus, toothed chain 1 is built symmetrically about longitudinal axis 8.
According to the present invention, single middle plate 5 can be used or the multiple middle plate 5(contacted with each other also can be used to be called plate group).In the situation of toothed chain with single middle plate 5, or in odd number plate 5 situation in, longitudinal axis 8 to extend through in this plate 5 or by middle plate 5.If be provided with plate 5 in two middle plates 5 or even number, then longitudinal axis 8 extends between plate 5 in contact.
Inner panel 7 has the plate thickness d of the thickness being different from outside plate 4 and middle plate 5.Herein, the plate thickness d of inner panel 7 is selected as the respective thickness being greater than all the other plates (i.e. the plate of outer link 2).Especially, the total thickness that the thickness of middle plate 5 or the multiple middle plate 5 that contacts with each other are added is less than the plate thickness d of single inner panel 7.And the addition total thickness of all plates of interior chain component 2 is greater than 1.13 with the ratio being added total thickness of all plates of outer link 3.Single middle plate 5 or multiple middle plate 5 can be configured to tooth plate.
The feature of outer link 2 is do not have relative movement between plate and pin 6.Only pivot movement is there is between inner link 3 and outer link 2.As a result, inner panel 7 is around pin 6 pivotable.Ensure that the chain link of toothed chain flexibility thus formed by inner panel 7 and pin 6.The wide design of inner panel 7 increases joint area, the contact area namely between inner panel 7 and pin 6.Comparing originally knownly does not have joint area possible in the toothed chain of lining, this generates larger joint area.And the wide structure of inner panel 7 provides smooth (namely not having ridge) joint area.Up to the present, when using multiple thin inner panel as plate group, due to existing manufacturing tolerances, this is not attainable.
Fig. 2 shows independent inner panel 7 in side view.Inner panel 7 is configured to the tooth plate with two teeth 9, and sprocket reception unit 10 is positioned between two teeth 9.The tooth of sprocket wheel can join in sprocket reception unit.Inner panel 7 comprises two outer flank root faces 11,12, and it can contact with the corresponding flank root face of sprocket tooth.In addition, inner panel 7 comprises two interior flank root faces 13,14.Interior flank root face 13,14 can contact with the flank root face of sprocket tooth.In addition, inner panel 7 comprises two pin openings 15,16, and in the assembled state of toothed chain 1, corresponding pin 6 extends through described pin opening.Inner panel 7 is about symmetrical line 18 one-tenth specular, and symmetrical line 18 extends to sprocket reception unit 10 from the top side 17 of inner panel 7.In the operation period of toothed chain, inner panel 7 is loaded strong F rand F l.These power are applied by the tension force acted on along the axis of symmetry on toothed chain 1.Therefore, power F rand F ldirection transverse to symmetrical line 18 acts on along inner panel 7, such as, from symmetrical line 18 along the direction of pin opening 15,16 and the direction along outer flank root face 11,12.
Due to power F rand F l, one of region that the load of the Regional Representative's inner panel 7 between pin opening 15,16 and outer flank root face 11,12 is maximum.Therefore the load bearing ability of inner panel 7 is also determined by the mesa width b in the region between pin opening 15,16 and outer flank root face 11,12.Herein, the size of mesa width b is confirmed as minimum range between outer flank root face 11,12 and pin opening 15,16.Herein, mesa width b is to measure at a right angle relative to outer flank root face 11,12.Outer flank root face 11,12 is not need inevitably to be configured to straight flank root face, but can have little radius.Similarly, pin opening 15,16 is not need to be manufactured into cylindrical inevitably, but such as can have avette or cartouche yet.
Outer flank root face 11,12 is limited by flank root face transition part 19,20, and flank root face transition part 19,20 is formed as the crown being with fillet.Flank root face transition part 19,20 defines border between outer flank root face 11 and interior flank root face 14 and between outer flank root face 12 and interior flank root face 14 and transition.In addition, outer flank root face 11,12 is limited by transition portion 21,22.Outer flank root face 11 is led in top side or back 17 by the transition portion 21 of band fillet.Similarly, outer flank root face 12 is led in top side 17 by transition portion 22.Top side 17 linearly extends between transition portion 21,22.In addition, inner panel 7 comprises the interior flank root face portion 23 of band fillet, and it forms the transition part of interior flank root face 13 to interior flank root face 14.
Fig. 3 (its not in scale) shows the top side 17 of inner panel 7.Inner panel 7 has plate thickness d, and plate thickness d is transversely in the orientation measurement of the axis of symmetry 8 of toothed chain 1.Transition portion 21 and transition portion 22 adjoin the both sides of top side 17.
Fig. 4 shows the side view of toothed chain 1, but not shown pin 6.Toothed chain 1 is completed in side by outside plate 4.In the embodiment shown, outside plate 4 has oval shape.Therefore, outside plate 4 covers the intermediate portion between two inner panels 7.If middle plate 5 is configured to tooth plate, then in, the region of the sprocket reception unit 10 of plate 5 is laterally covered by outside plate 4.
Inner panel is produced by meticulous mode that is die-cut or that shear.Vertical cut part in pin opening is more than or equal to 90% of plate thickness d.On interior flank root face, vertical cut part is at least 80% of plate thickness d.

Claims (10)

1. a toothed chain (1), described toothed chain (1) comprises inner link (2) in succession alternating with each other and outer link (3), described outer link (3) comprises at least two outside plates (4), plate (5) and two pins (6) at least one, described inner link (3) comprises at least two inner panels (7) being formed as tooth plate, described inner panel (7) comprises two outer flank root faces (11, 12) and two pin openings (15, 16), and described at least one plate (5) be positioned between described inner panel (7), it is characterized in that, each of described inner panel (7) has plate thickness (d) and mesa width (b), described mesa width (b) is defined as outer flank root face (11, 12) and immediate pin opening (15, 16) minimum range between, and plate thickness (d) is greater than 1.6 with the ratio of mesa width (b), and wherein two pin openings (15 of each inner panel (7), 16) outer surface of that the internal surface of each is sold with corresponding two respectively directly contacts, wherein said inner panel is constructed by meticulous die-cut mode and produces.
2. toothed chain (1) as claimed in claim 1, is characterized in that, described plate thickness (d) is greater than 1.7 with the ratio of mesa width (b), is particularly preferably greater than 1.75.
3. toothed chain (1) as claimed in claim 1, is characterized in that, described plate thickness (d) is less than or equal to 3 with the ratio of mesa width (b).
4., as aforementioned toothed chain according to claim 1 (1), it is characterized in that, the ratio of the total thickness of the total thickness of all plates of described inner link (2) and all plates of described outer link (3) is greater than 1.13.
5. as aforementioned toothed chain according to claim 1 (1), it is characterized in that, the axis of symmetry (8) extended along described toothed chain (1) extends through plate at least one (5) or extends between plate (5) at least two contacts.
6. as aforementioned toothed chain according to claim 1 (1), it is characterized in that, the thickness of a described middle plate (5) or the total thickness of described multiple middle plate (5) are less than the described plate thickness (d) of described inner panel (7).
7., as aforementioned toothed chain according to claim 1 (1), it is characterized in that, described at least one plate (5) be configured to tooth plate.
8., as aforementioned toothed chain according to claim 1 (1), it is characterized in that, described at least one plate (5) be slid on described pin (6).
9., as aforementioned toothed chain according to claim 1 (1), it is characterized in that, described outside plate (4) is constructed to guide plate.
10. the inner panel for toothed chain (1) (7), described inner panel (7) comprises two outer flank root faces (11, 12) and two pin openings (15, 16), it is characterized in that, described inner panel (7) has plate thickness (d) and mesa width (b), described mesa width (b) is defined as outer flank root face (11, 12) and immediate pin open (15, 16) minimum range between, and plate thickness (d) is greater than 1.6 with the ratio of mesa width (b), and wherein the internal diameter of each pin opening corresponds essentially to the diameter of the correspondence pin of described toothed chain, wherein said inner panel is constructed by meticulous die-cut mode and produces.
CN201110064428.9A 2010-03-18 2011-03-17 Sprocket chain with optimised tooth mounts Active CN102192270B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP10002898A EP2366917B1 (en) 2010-03-18 2010-03-18 Sprocket chain with optimised tooth links
EP10002898.4 2010-03-18

Publications (2)

Publication Number Publication Date
CN102192270A CN102192270A (en) 2011-09-21
CN102192270B true CN102192270B (en) 2015-05-06

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US (1) US20110230290A1 (en)
EP (1) EP2366917B1 (en)
JP (1) JP2011196550A (en)
CN (1) CN102192270B (en)

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JP5976257B1 (en) * 2013-08-14 2016-08-23 ボーグワーナー インコーポレーテッド Chains with staggered inner link positions that allow thin lacing with improved NVH behavior
CN106111881A (en) * 2016-06-24 2016-11-16 浙江工贸职业技术学院 A kind of assembly technology of novel Hy Vo silent chain
DE102017116251A1 (en) 2017-07-19 2019-01-24 Schaeffler Technologies AG & Co. KG Toothed chain with tabs whose tab openings have convex edge zones

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Also Published As

Publication number Publication date
EP2366917A1 (en) 2011-09-21
JP2011196550A (en) 2011-10-06
US20110230290A1 (en) 2011-09-22
EP2366917B1 (en) 2013-03-13
CN102192270A (en) 2011-09-21

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